.menu {
      position: fixed;
      top: 0;
      padding: 0px;
    }
    .menu ul {
      margin: 0px;
      padding: 0px;
      list-style: none;          
    }
    .menu ul li {
      float: left;
      width: 200px;
      height: 40px;
      background-color: rgb(3, 4, 85);
      opacity: .8;
      line-height: 40px;
      text-align: center;
      font-size: 20px;
    }
    .menu ul li a {
      text-decoration: none;
      color: white;
      display: block;
    }
    .menu ul li a:hover {
      background-color: rgb(241, 20, 20);
    }
    .menu ul li ul li {
      display: none;
      }
    .menu ul li:hover ul li {
      display: block;
    }